Sclerosing epithelioid fibrosarcoma associated with WRN gene variant presenting as chronic dyspnea and pathologic cervical fracture: a case report and review of the literature oleh Alexander T. Phan, Henrik Ghantarchyan, Chayanne Khosravi, Bahareh Maknouni, Ankur Bhagat, Jeff Chen, Ahmad Ibrahim, Mufadda Hasan